CVE-2021-44164
CVE-2021-44164 is a critical-severity vulnerability in Chinasea Qb Smart Service Robot with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (79th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-434
- Affected product: Chinasea Qb Smart Service Robot
- Published:
- Last modified:
Description
Chain Sea ai chatbot system’s file upload function has insufficient filtering for special characters in URLs, which allows a remote attacker to by-pass file type validation, upload malicious script and execute arbitrary code without authentication, in order to take control of the system or terminate service.
Frequently asked questions
- What is CVE-2021-44164?
- Chain Sea ai chatbot system’s file upload function has insufficient filtering for special characters in URLs, which allows a remote attacker to by-pass file type validation, upload malicious script and execute arbitrary code without authentication, in order to take control of the system or terminate service.
- How severe is CVE-2021-44164?
- CVE-2021-44164 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-44164 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-44164?
- CVE-2021-44164 affects Chinasea Qb Smart Service Robot. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-44164?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-44164 published?
- CVE-2021-44164 was published on 2021-12-20 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:chinasea:qb_smart_service_robot:-:*:*:*:*:*:*:*
More vulnerabilities in Chinasea Qb Smart Service Robot
- CVE-2021-44162 — High (CVSS 7.5): Chain Sea ai chatbot system’s specific file download function has path traversal vulnerability. The function has…
- CVE-2021-44163 — Medium (CVSS 6.1): Chain Sea ai chatbot backend has improper filtering of special characters in URL parameters, which allows a remote…
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